More link spam getting through to the lists

Lately I've been seeing about one a day of these obvious spams on the
lists.  Can we do anything to block them?  It mostly seems to be from
gmail, though I'm not sure that's helpful for filtering purposes.
        regards, tom lane


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Date: Wed, 8 Jun 2011 18:01:16 +0100
Message-ID: <BANLkTi=iG=5MeyMf0r4OY8i0f_nr=T6U4g@mail.gmail.com>
Subject: [GENERAL] 
From: Callum Scott <scott.callum@gmail.com>
To: paul.connelly1@o2.co.uk, peterbratcher@hotmail.com,       peter.cruickshank@gmail.com, petercruikshank@gmail.com,
   colinpeters@fvhost.org.uk, pgsql-general@postgresql.org,       info@power-adapters.co.uk, rathgild@gmail.com,
redmanifesto@gmail.com,      register@dum.acc.umu.se
 
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